Rotor iron core and motor having the same

Abstract

The invention provides a rotor iron core and a motor having the same. The rotor iron core comprises a plurality of laminated rotor punching sheets; and each rotor punching sheet consists of a shaft hole and a plurality of magnetic steel grooves that are distributed uniformly along the peripheral direction of the rotor punching sheet and extend along a radial direction. Each magnetic steel groove includes: an outer edge straight wall that is perpendicular to the radial direction of the rotor punching sheet, an inner edge straight wall that is parallel to the outer edge straight wall and is arranged between the outer edge straight wall and the shaft hole, a first side wall that is connected between one end of the outer edge straight wall and one end of the inner edge straight wall, and a second side wall that is opposite to the first side wall and is connected between the other end of the outer edge straight wall and the other end of the inner edge straight wall. At least one of the first side wall and the second side wall is inclined relative to the outer edge straight wall. According to the rotor iron core, the motor vibration and noise can be reduced.

Description

technical field [0001] The invention relates to the field of electrical equipment, in particular to a rotor iron core and a motor with the same. Background technique [0002] In the prior art, it relates to a tangential magnetic steel rotor structure of a permanent magnet motor. The punch adopts the asymmetric structure of the notch to achieve the effect of oblique polarity through forward and reverse axial stacking. However, the asymmetric opening slot plays the role of oblique poles, but the magnetic flux leakage of the internal isolation is large, and the performance of the motor is reduced. [0003] In another prior art, it relates to a tangential rotor punch, a rotor core with the same, and a motor. The inner (outer) magnetic isolation bridges of the rotor punches are alternately disconnected from the adjacent inner (outer) magnetic isolation bridges along the circumferential direction. Open and unbroken punches are placed alternately to reduce flux leakage. There i...

AI Technical Summary

Problems solved by technology

[0006] To sum up, there are the following problems in the prior art: the vibration and noise of the rotor straight slot structure is large, and the oblique slot structure is difficult to implement; the tangential rotor structure has serious magnetic flux leakage, low utilization rate of magnetic steel, performance degradation and cost increase; The rotor structure of the tangential motor has poor demagnetization ability and reduced overload capacity; the use of anti-leakage magnetic collars or reducing the thickness of the inner magnetic bridge leads to problems such as complex process and low rotor strength; after the magnetic steel is magnetized, during the assembly process , it is easy to reverse the polarity of N and S

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